Fig. 3. ERK activation in peripheral nervous system. Dp-ERK stained 9.0 dpc (A) and 10.5 dpc (D) embryos with yellow arrowheads indicating neural crest and black arrowheads indicating nerve tracts of glossopharyngeal and vagus ganglia. Broken boxes approximate positions of the higher magnification panels indicated and broken lines in B and D approximate position of sections shown in C and E-H, respectively. White arrowhead (F) indicates dp-ERK positive dorsal root ganglia and white arrow (H) indicates dp-ERK staining in sensory nerve root found along the length of the neural tube at this stage. Scale bars: 600 µm.

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